update obsidian config

lua/plugin/obsidian.lua

@@ -1,6 +1,6 @@
 return {
   {
-    "epwalsh/obsidian.nvim",
+    "obsidian-nvim/obsidian.nvim",
     version = "*", -- recommended, use latest release instead of latest commit
     lazy = true,
     ft = "markdown",
@@ -44,6 +44,12 @@ return {
           end,
           opts = { noremap = false, expr = true, buffer = true },
         },
+        ["<Space>On"] = {
+          action = function()
+            return "<cmd>ObsidianNew<cr>"
+          end,
+          opts = { noremap = false, expr = true, buffer = true },
+        },
         -- Toggle check-boxes.
         ["<leader>ch"] = {
           action = function()